I like the third one. Hands down.

Here is another example. NOT my entry due to the lack of sharpness, but it contains not one, but TWO examples of transparency: the beer glass and the window behind:



Incidentally, the little girl inside comes from this family. She strayed from her sisters and found her way inside our house. The picture was taken just before reuniting her with her family.



The swarm had taken up residence in our plum tree. I called a bee keeper I know to come and collect them: